Welcome to the 25th Workshop website!

Workshop's mission

The International Workshop on HIV and Hepatitis Observational Databases (IWHOD) brings senior and junior HIV and hepatitis observational database researchers together to advance the methodology and analysis of observational data. No other workshop or conference devotes attention to the methodology of setting up and analyzing observational data, despite their importance in providing critical information on population outcome in real world settings outside the controlled setting of randomized trials. We are once again aiming to include attendees representing cohort studies from all regions. As in the past, we encourage discussion of work in progress, so all data presented will not be publicised outside of the Workshop.

Workshop at a glance

  • Beginning midday on Thursday 25th March 2021 and ending midday on Saturday 27th March 2021
  • The programme is based on abstract selection by the Scientific Committee
  • Attendance is contingent on submission and acceptance of abstract


  • Call for abstract invitation: September 2020
  • Abstract submission opens: Friday, 6th November 2020
  • Abstract submission deadline: Friday, 4th December 2020 (18.00 GMT)
  • Abstract selection and final programme by Scientific Committee: late January 2021
  • Abstract status will be notified by the first week of February 2021

Ongoing and New Collaborations
If you and your collaborators are interested in holding a side meeting at the Workshop, please communicate with your colleagues directly, and contact Dolores O'Sullivan (d.osullivan@visualresponse.com) from Visual Response to arrange for a time slot and a meeting room at the hotel as soon as possible and no later than 19 October 2021.

Financial assistance: We continue to strongly encourage abstract submissions from resource-constrained settings. Recognising that the additional expenses may deter some from attending the meeting, we offer 10 scholarships for delegates from low and middle-income countries whose abstracts have been accepted. When submitting your abstract you will be asked whether you qualify for a scholarship.

Young Investigator Award:Two Young Investigator Awards for early career researchers are given at each workshop, one for best oral and one for best poster. Awardees receive an invitation to attend the following year’s IWHOD and their registration fee is waived. When submitting your abstract you will be asked whether you qualify for this Award.

23rd IWHOD, Athens 2019 Young Investigator Awards for:

  • Best Poster went to Julien Riou
  • Best Oral went to Liza Coyer

Past awards
22nd IWHOD, Fuengirola 2018, Young Investigator Awards for:

  • Best Poster: Katharina Kusejko
  • Best Oral presentation: Louisa Carlisle on behalf of Zurich Primary HIV Infection Cohort Study

For further information email: IWHODSecretariat@ucl.ac.uk